SCREW n.
out of order, so that work is not done smoothly; as, there is a screw loose somewhere. H. Martineau. -- Endless, or perpetual screw, a screw used to give motion to a toothed wheel by the action of its threads between the teeth of the wheel; -- called also a worm. -- Lag screw. See under Lag. -- Micrometer screw, a s…